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J. NOGUERA-AND J. DOVAL. ROTARY AIR COMPRESSOR- APPLICATION FILED MAY 1,1919- r 1,320,792. Patented Nov. 4, 1919.

2 SHEETSSH Illllilll llll .I. NOGUERA AND J. DOVAL.

ROTARY AIR COMPRESSOR.

APPLICATION FILED MAYI. 1919.

1 $20,792. Patented Nov. 4, 1919.

2 SHEETS-SHEET 2.

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J UAN NOGUEBA AND JESUS DOVAL, 0F BUENOS AIRES, ARGENTINA.

ROTARY AIR-COMPRESSOR.

Specification of Letters Patent.

Patented Nov. 4:, 1919.

Application filed May 1, 1919. Serial No. 293,920.

5 gentina, have invented certain new and useful Improvements inRotaryAir-Compressors, of which the following is a specification.

This invention relates to a rotary air compressor and has for itsessential object an apparatus of the said kind in which com pressionwill be performed continuously, the objections which heretofore renderedimpossible the practical use of-such apparatus having been eliminatedtherefrom.

In order that the invention may be readily understood and convenientlycarried into practice, a preferred embodiment of the same has been shownby way of example in the accompanying illustrative drawings, in which:

Figure 1 is a front elevation looking toward the apparatus, of the sideon which the cylinders are arranged.

Fig. 2 is a partial vertical section, illustrating the structure of theapparatus and the operation of its cylinders.

Fig. 3 is a section on the broken line AB of Fig. 2 and finally,

Fig. 4 is an interior viewof the rear part of the apparatus, alloperative partshaving been removed therefrom.

In all the said views, the same numbers of reference indicate like orcorresponding parts.

In the particular embodiment illustrated, the apparatus is supported ona pedestal or base 1 secured in any suitable manner, as by means ofscrews, to a convenient part of an automobile, when the apparatus isintended for inflating the air chambers of the tires thereof. The bodyof the device is secured by means of a lower ear 3 to the said pedestalby means of a screw and nut 2, which connection allows of adjusting theapparatus to any suitable incline and at the same time this connectionfacilitates the coupling thereof to the driving element.

5 is a casting of circular shape within which is radially andsymmetrically. arranged, so as to protrude therefrom, a plurality ofradial cylinders 17eight in the case under consideration. The casting isalso provided with a bearing 6--within which rotates the the outer endof which is keyed a pulley 11.

formed with a cap which entirely surrounds the end of said axle, saidpulley being retamed in position by means of a pin 10 or the like, sothat it will rotate together with the axle 7. Around the bearing ismounted an antifriction sleeve 8, around which rotates the said pulley.The axle 7 extends through the central recess or cavity of the castingwherein it is provided with an enlargement 12 011 which is mounted thecam 14, provided at its periphery with a web or rim 15 of reducedsection, to which are connected the forked ends of the rods 19 of thepistons 18, operating in the interior of the cylinders 17. Around thecam or eccentric is mounted a ring 16 of larger diameter and between theouter rim of the eccentric and the said ring is left a circular space ortrack in which travel the pins 20 which extend through the forked endsof the rods 19. In the interior of the central recess of the aforesaidcasting 5 are mounted, so as to snugly fit therein, two disks 13 whichserve to guide the piston rods 19 in their reciprocating movement andalso constitute a bearing for the enlarged part 12 of the axle. The saiddisks 13 are secured one to the other by means of bolts 13 and arearranged to form the closure for the lower ends of the cylinders.

The piston of each ofthe cylinders con sists of a metallic inner plate21 on which are placed a leather washer 22 and an outer metallic plate24:, constructed like a nut, with a leather washer 22 on its innersurface. Between the two leather washers 22 is placed an intermediatemetallic washer .23. The nut plate 24L is screwed on the narrow threadedend 25 of the stem 19. It will thus be seen that to the washers 22 andthe intermediate part 23 the required degree of compression may beimparted in order to assure the tightness of the joint and hence, theperfect operation of the cylinders. At the outer end or head of each ofthe cylinders is arranged a casing 26 within which is mounted the airinlet valve 27 normally held in its closed position by the action of aspring. At the end of each of the cylinders, near the head thereof, isarranged the casing 28 of the outlet valve 29, also normally retained inits closed position by the act-ion of justed, serves to close the same,forming the air chamber 30 into which open the valve ports 29 and whichcommunicates with the outer air by means of the nipple 31, to whichlatter is connected the tube by which the compressed air is led to thetire to be inflated, or to any other point where said compressed air maybe needed.

On the periphery of the guide disks 13 are formed continuous grooves orpassages 32 by means of which the outer ends of all the cylinders 17 aremade to communicate with each other. The particular arrangement of thesaid grooves is a factor of much importance in this device, asotherwise, by the movement of the pistons within each of the cylinders,variations of pressure would occur in the same which would interferewith the satisfactory working of the apparatus, while in the actualarrangement the variations of pressure of any one or more of thecylinders will always be compensated for by those occurring in theremainder of them with which they are in communication, so that and thepressure existing in the interior of the entire series of cylinders willalways be constant.

The fitting of the part or body 5 which supports the cylinders, with thecover or casing a, is made conical, as shown at 86, so that by theinsertion of leather washers 85 or similar means a perfectly tight jointis obtained, without necessitating a very exact machine finish of thecontacting surfaces.

Besides, the joint is also secured by means of the bolts 33, affixed tothe cover and on which are screwed the nuts 34 so that the body will berigidly held in position.

As may be seen by inspecting the drawings, the upper cover of thecylinders 17, provided with the valves for the admission of air to saidcylinders, forms part of the said casing or cover 4, being cast in onepiece with the same. The oint between the said cover and the top of thecylinders which is also of conical shape, is preferably provided withleather washers 37, in order to make the joint air tight.

The cover 4 is provided at its center with a threaded hole 38 whichallows of securing thereto a suitable lubricating device (not shown).Said cover is also provided at the air chamber 30 with a second hole orport 39, normally held closed by any suitable means, said hole beingintended for cleaning the air chamber.

It will be evident that into the above described embodiment of theinvention, several modifications of details may be introduced withoutdeparting from the scope of this invention and for the purpose ofadapting the same for the several uses to which it may be applied.

The apparatus according to the form o construction shown, works in thefollowin manner: The pulley 11 is coupled to a motor or any othersuitable source of power and transfers motion to the axle 7-12 and inconsequence to the eccentric 1 f connected, as shown, to the rods of thepistons of the cylinders 17 which will successively move to and fro, aswill be clearly understood by referring to Fig. 2 of the accompanyingdrawings.

The receding movement of the pistons opens the inlet valves 27, causingthe air from outside to enter into the interior of the cylinders 17, infront of the pistons, while the air behind the pistons is caused to passby the ducts 32 to another or others of the said cylinders where themovement of the piston or pistons will have formed vacuum. The outwardmotion of the said pistons will cause the inlet valves to close whilethe outlet 29 are opened, thereby allowing of the discharge of the airwhich has accumulated within the chamber 30 from which it is withdrawnunder the required degree of pressure by the nipple 31.

l/Ve now declare that what we claim as new and desire to secure byLetters Patent, is:

1. In a rotary air compressor, the combination of a body formed with aplurality of radially and symmetrically arranged cylinders; a pistonworking in each cylinder and having its rod extending radially inwardtoward the axis of the body; an axially-dis posed driving shaftextending into said body; an eccentric fixed to said shaft; a ringencircling said eccentric and spaced therefrom to provide a circulartrack, the inner ends of the piston rods being engaged in said track foractuation by said eccentric; a pair of guide disks mounted on said shaftwithin said body at oppositesides of said piston rods and arranged toclose the inner ends of the cylinders; and a cover for said body securedthereto and arranged to close the outer ends of the cylinders, saidcover co-acting with said body to form an interposed, annular compressedair chamber; each cylinder being provided at its outer end with avalve-controlled air inlet, and at itsv side with a valve-controlledoutlet for the compressed air which communicates with said chamber, thelatter having means for discharging the compressed air therefrom.

2. In a rotary air compressor, the combination of a body formed with aplurality of radially and symmetrically arranged cylinders; a pistonworking in each cylinder and having its rod extending radially inwardtoward the axis of the body; an axially-disposed driving shaft extendinginto said body; an eccentric fixed to said shaft and operativelyconnected with the inner ends of the piston rods; a pair of guide disksmounted on said shaftwithin said body at opposite sides of the pistonrods, said disks having their peripheries arranged to close the innerends of the cylinders and formed with circumferential grooves to providecommunication between said cylinders; and a cover for said body securedthereto and arranged to close the outer ends of the cylinders, saidcover co-acting with said body to form an interposed, annular compressedair chamber; each cylinder being provided at its outer end with avalve-controlled air inlet, and at its side with a valve-controlledoutlet for the compressed air which communicates with said chamber, thelatter having means for discharging the compressed air therefrom.

3. In a rotary air compressor, the combination of a body formed with aplurality of radially and symmetrically arranged cylinders; a pistonworking in each cylinder and having its rod extending radially inwardtoward the axis of the body; an axially-di sposed driving shaftextending into said body; an eccentric fixed to said shaft andoperatively connected with the inner ends of the piston rods; guidedisks for said piston rods; and a cover for said body secured theretoand having a tight, conical fit therewith, said cover being arranged toclose the outer ends of the cylinders and co-acting with said body toform an interposed, annular compressed air chamber; each cylinder beingprovided with valve-controlled inlet and outlet openings, the lattercommunicating with said chamber, and the chamber having a dischargeoutlet for the compressed air.

4. In a rotary air compressor, the combination of a body formed with aplurality of radially and symmetrically arranged cylinders; a pistonworking in each cylinder and having its rod extending radially inwardtoward the axis of the body; an axially-disposed driving shaft extendinginto said body; an eccentric fixed to said shaft; a ring encircling saideccentric and spaced therefrom to provide a circular track, the innerends of the piston rods being engaged in said track for actuation bysaid eccentric; a pair of guide disks mounted on said shaft within saidbody at opposite sides of said piston rods and arranged to close theinner ends of the cylinders; and a cover for said body secured theretoand providing a compressed air chamber; each cylinder being providedwith valve-controlled inlet and outlet openings, the lattercommunicating with said chamber, and the chamber having a dischargeoutlet for the compressed air.

5. In a rotary air compressor, the combination of a body formed with aplurality of radially and symmetrically arranged cylinders; a pistonworking in each cylinder and having its rod extending radially inwardtoward the axis of the body; an axially-dis posed driving shaftextending into said body; an eccentric fixed to said shaft andoperatively connected with the inner ends of the piston rods; a pair ofguide disks mounted on said shaft within said body at opposite sides ofthe piston rods, said disks having their peripheries arranged to closethe inner ends of the cylinders and formed with circumferential groovesto provide communication between said cylinders; and a cover for saidbody secured thereto and providing a compressed air chamber; eachcylinder being provided with valve-controlled inlet and outlet openings,the latter communicating with said chamber, and the chamber having adischarge outlet for the compressed air.

In testimony whereof we aiiix' our signatures.

JUAN NOG'UERA. JESUS DOVAL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). O.

